| 摘要 |
PCT No. PCT/SU88/00113 Sec. 371 Date Nov. 22, 1989 Sec. 102(e) Date Nov. 22, 1989 PCT Filed May 20, 1988 PCT Pub. No. WO88/09311 PCT Pub. Date Dec. 1, 1988.The invention relates to production of superconductors, more particularly, LnM2IIM3IOy compounds where y=6-8; Ln=Y, Sc or lanthanide; MII=Ba, Ca or Sr; MI=Cu, Cu+Ag or LnM2IIMIOy-xF where x=1-2. It comprises local initiation of an exothermic reaction in a stoichiometric mixutre of source constituents chosen to provide for production of the afore-mentioned compounds. An exothermic mixture of corresponding constituents includes a non-combustible component and a combustible component comprising at least one metal from the group composed of a rare-earth metal of the periodic system chosen from scandium, yttrium and lanthanide, a metal of group II of the periodic system, a metal of group I of the periodic system or hydride of at least one of said metals.
|
